<template>
  <ul>
    <li :style="{ opacity }">欢迎学习vue</li>
    <li>news001 <input type="text" /></li>
    <li>news002 <input type="text" /></li>
    <li>news003 <input type="text" /></li>
  </ul>
</template>

<script>
export default {
  name: "News",
  data () {
    return {
      opacity: 1
    }
  },

  //激活(路由组件独有的两个钩子)
  activated () {
    console.log('News组件被激活');
    this.timer = setInterval(() => {
      console.log('@')
      this.opacity -= 0.01;
      if (this.opacity <= 0) this.opacity = 1;
    }, 16);
  },
  //失活
  deactivated () {
    console.log('News组件失活了');
    clearInterval(this.timer);
  }
}
</script>

<style scoped>
</style>
